Re: +2 Twin Cam
Posted: Wed May 12, 2004 2:07 pm
one thing to check is your head gasket. The proper Elan head gasket has smaller holes for the coolant near cylinders 2 and 3 to make sure the coolant does not bypass the cylinder head and go straight to the thermostat. The wrong head gasket will make cylinders 1 and 4 have hotter valves and thus be more likely to burn.
Unless you drive on the highway an awfull lot it is extremely unlikely that you have valve seat recession even if you did not run an additive to your unleaded fuel. Just ask all the folks over here in the USA who have run their car with stock valvetrains for 20+ years on unleaded. The seat inserts in the aluminum head are hard enough for normal use.
Your valve could easily have burned due to it being too thin on the edge after being reground to fix the first problem. A thinner head valve will run hotter and thus burn easier.
Now I just need to check Holbay about that 288degree 0.389 lift CAM. It sounds just perfect for what I am looking for for my Stromber engine then later for my weber engine when I get time and money to rebuild it.
Rob
Unless you drive on the highway an awfull lot it is extremely unlikely that you have valve seat recession even if you did not run an additive to your unleaded fuel. Just ask all the folks over here in the USA who have run their car with stock valvetrains for 20+ years on unleaded. The seat inserts in the aluminum head are hard enough for normal use.
Your valve could easily have burned due to it being too thin on the edge after being reground to fix the first problem. A thinner head valve will run hotter and thus burn easier.
Now I just need to check Holbay about that 288degree 0.389 lift CAM. It sounds just perfect for what I am looking for for my Stromber engine then later for my weber engine when I get time and money to rebuild it.
Rob